[Bug 5518] Why are rules allowed on both element declaration and type definitions

http://www.w3.org/Bugs/Public/show_bug.cgi?id=5518

           Summary: Why are rules allowed on both element declaration and
                    type definitions
           Product: SML
           Version: LC
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Core
        AssignedTo: cmsmcq@w3.org
        ReportedBy: pratul.dublish@microsoft.com
         QAContact: public-sml@w3.org


Comment#1 in
http://lists.w3.org/Archives/Member/w3c-xml-schema-ig/2008Mar/0001.html 

It seems unwise to go beyond what XML Schema 1.1 will support in the
way of assertions:  is allowing 'rules' as part of both element
declarations and type definitions really necessary?